Boiler connection



April 29, 1930. v. WILHELMI BOILER CONNECTION Original Filed Dec. 4. 1926 kllcvzfz'zz 716% elm z' Y 77 7.3 Gum/mm; C]

I 9 lls F Patented Apr. 29, 1930 VALENTIN WILHELMI, OF Marmot, ew JERSEY BOILER CONNECTION Original application filed. December 4, 1926, Serial N 0. 152,567. Divided and this application filed February 13, 1928. Serial 1%. 253,848.

My invention relates to improvements in connections for boilers of the type shown and described in my co-pending application, Serial No. 152,567, filed December 41th, 1926, of which this case is a division; and more especially to means used on domestic hot water boilers for attaching hot and cold water pipes thereto.

In the production of boilers for domestic purposes, it has been customary to use galvanized iron for the body or shell; and bosses were welded at desirable points thereon and drilled and tapped for the piping connections. WVhile such boilers are generally satisfactory for the purpose, still owing to the iron used in their construction, they need frequent draining to remove rust particles therefrom. As a consequence, copper boilers have been frequently substituted in the better class of installations, but with boilers of copper, the

welding of the bosses thereon could not be accomplished and threads suflicient to form a leak proof joint could not be produced.

An object of this invention is to provide 2 such a connection between a boiler and the plumbing system of a building as will permit of the use of copper for the body of the boiler, by reinforcing the boiler shell at the points of introduction of the connecting pipes; and at 3c the same time facilitate the production of threads by which a leak proof joint can be accomplished.

A feature of the invention is an annular flange formed on the boiler shell which enters 3 an annular groove in a clamping element to center a threaded boss or spud in an opening of the shell and also serve as a seal to prevent the escape of the water.

With the above and other objects in View which will become more apparent as the description proceeds, one embodiment of the invention consists in the novel constructlon,

combinationand arrangement of parts which will be fully set forth in the following speci fication and illustrated in the accompanying drawing, in which Figure 1 is a vertical section, with parts shown in elevation of a boiler of improved construction with the joints or connections 59 forming part of the present invention.

Figure 2 is also a sectional view, enlarged, of the joint, shown in Figure1.

Referring more particularly to the drawings 1) designatesl-the iboiler shell of cylindrical or other form having the heads (2) and (3) rivets (4) being employed to pass through the overlapped parts for securing the heads to the boiler. I

The heads 2 and 3 are centrally perforated and each has an out-turned flange (5) adapted to be received into the annular channels (6) in the faces of the nuts or clamping elements (7) provided with the internal screw threads (8) to co-operate with the external threads (9) upon the outsides of the spuds or bosses, indicated generally at (10). Each boss or spud (10) is threaded over its whole length, except at its inner end (11) which is inserted through the opening surrounded by the flange (5). This boss (10) is of materially smaller outside diameter than the inside diameter of the flange (5) and when centered in the opening there will be an annular space between it and the inside of the flange. This space will be filled with solder (12). The

original position of the end (11) is shown at (13) in dotted lines.

After assembly, and when a body of solder (12) has been flowed into the cavity between the spud connection and the flange (5), the inner end (12) of the spud is bent over as by rolling to the position, shown in full lines, whereupon the body of solder is forced tightly between the parts referr d to and downwardly against the nut face and also possibly into the channel (6), thus forming a tight joint between the threads and between the channeled and flanged parts. Provision is made for holding a substantial body of the solder in order to add strength to the construction. After the spud connections are in place the heads may be united with the boiler and the reinforcing bands (14:) and (15) sweated or otherwise put in place. The boiler is then ready for use and when installed the pipe connections will be fitted thereto in the usual manner.

I have illustrated and described a preferred and satisfacory embodiment of my invention, but it is obvious that changes may be made lUU therein Within the spirit and scope thereof as defined in the appended claim:

What is claimed is A boiler connection comprising in combination With a boiler having an opening with van outturned flangesurrounding said open-- ing, a'sp'ud connection in the form of a-holl ovv boss fitted to the opening, said boss being of smaller outside diameter than the Width of the opening except at'its inner end which is expanded to engagethe inside of the. boiler adjacent the opening, the boss projecting through the opening to the outsideof the boiler and being externally threaded, and a nut screwed upon the boss and having a channel in one-face separate from the threaded opening in the nut toreceive theflange around the opening on; the outside of the-boiler the spud connection thus beinghe'ld securely by the" gripping action of its vexpanded end and said nut In testimony that I claim the foregoing as my invention, I have signed my name hereto.

TIN WVILHELMI; 

